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This commit is contained in:
albert
2002-12-21 06:22:00 +00:00
parent b8c8125f63
commit 1158fdd1b1
7 changed files with 40 additions and 31 deletions
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57
proc/readproc.c
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@ -77,6 +77,13 @@ void freeproc(proc_t* p) {
}
// 2.5.xx looks like:
//
// "State:\t%s\n"
// "Tgid:\t%d\n"
// "Pid:\t%d\n"
// "PPid:\t%d\n"
// "TracerPid:\t%d\n"
static void status2proc(const char *S, proc_t *restrict P){
char* tmp;
@ -105,11 +112,9 @@ static void status2proc(const char *S, proc_t *restrict P){
if(likely(tmp)) P->state = tmp[7];
else fprintf(stderr, "Internal error!\n");
tmp = strstr (S,"Pid:");
tmp = strstr (S,"PPid:");
if(likely(tmp)) sscanf (tmp,
"Pid:\t%d\n"
"PPid:\t%d\n",
&P->pid,
&P->ppid
);
else fprintf(stderr, "Internal error!\n");
@ -166,10 +171,8 @@ static void status2proc(const char *S, proc_t *restrict P){
/* stat2proc() makes sure it can handle arbitrary executable file basenames
* for `cmd', i.e. those with embedded whitespace or embedded ')'s.
* Such names confuse %s (see scanf(3)), so the string is split and %39c
* is used instead. (except for embedded ')' "(%[^)]c)" would work.
/* Reads /proc/*/stat files, being careful not to trip over processes with
* names like ":-) 1 2 3 4 5 6".
*/
static void stat2proc(const char* S, proc_t *restrict P) {
unsigned num;
@ -181,9 +184,8 @@ static void stat2proc(const char* S, proc_t *restrict P) {
P->rtprio = -1;
P->sched = -1;
P->pid = strtol(S, &tmp, 10);
S = tmp + 2;
tmp = strrchr(S, ')'); // split into "PID (cmd" and "<rest>"
S = strchr(S, '(') + 1;
tmp = strrchr(S, ')');
num = tmp - S;
if(unlikely(num >= sizeof P->cmd)) num = sizeof P->cmd - 1;
memcpy(P->cmd, S, num);
@ -376,16 +378,20 @@ next_proc: /* get next PID for consideration */
#define flags (PT->flags)
if (flags & PROC_PID) {
if (unlikely(!*PT->pids)) /* set to next item in pids */
return NULL;
sprintf(path, "/proc/%d", *(PT->pids)++);
pid_t pid = *(PT->pids)++;
if (unlikely(!pid)) return NULL;
p->pid = pid;
snprintf(path, sizeof path, "/proc/%d", pid);
} else { /* get next numeric /proc ent */
for (;;) {
ent = readdir(PT->procfs);
if(unlikely(unlikely(!ent) || unlikely(!ent->d_name))) return NULL;
if(likely( likely(*ent->d_name > '0') && likely(*ent->d_name < '9') )) break;
if(likely( likely(*ent->d_name > '0') && likely(*ent->d_name <= '9') )) break;
}
sprintf(path, "/proc/%s", ent->d_name);
p->pid = strtoul(ent->d_name, NULL, 10);
memcpy(path, "/proc/", 6);
strcpy(path+6, ent->d_name); // trust /proc to not contain evil top-level entries
// snprintf(path, sizeof path, "/proc/%s", ent->d_name);
}
#ifdef FLASK_LINUX
if ( stat_secure(path, &sb, &secsid) == -1 ) /* no such dirent (anymore) */
@ -452,9 +458,6 @@ next_proc: /* get next PID for consideration */
else
p->environ = NULL;
if (unlikely(p->state == 'Z')) /* fixup cmd for zombies */
strncat(p->cmd," <defunct>", sizeof p->cmd);
return p;
}
#undef flags
@ -484,12 +487,15 @@ next_proc: /* get next PID for consideration */
/*printf("PT->flags is 0x%08x\n", PT->flags);*/
#define flags (PT->flags)
while ((ent = readdir(PT->procfs)) &&
(*ent->d_name < '0' || *ent->d_name > '9'))
;
if (!ent || !ent->d_name)
return NULL;
sprintf(path, "/proc/%s", ent->d_name);
for (;;) {
ent = readdir(PT->procfs);
if(unlikely(unlikely(!ent) || unlikely(!ent->d_name))) return NULL;
if(likely( likely(*ent->d_name > '0') && likely(*ent->d_name <= '9') )) break;
}
p->pid = strtoul(ent->d_name, NULL, 10);
memcpy(path, "/proc/", 6);
strcpy(path+6, ent->d_name); // trust /proc to not contain evil top-level entries
// snprintf(path, sizeof path, "/proc/%s", ent->d_name);
#ifdef FLASK_LINUX
if (stat_secure(path, &sb, &secsid) == -1) /* no such dirent (anymore) */
@ -550,9 +556,6 @@ next_proc: /* get next PID for consideration */
else
p->environ = NULL;
if (p->state == 'Z') /* fixup cmd for zombies */
strncat(p->cmd," <defunct>", sizeof p->cmd);
return p;
}
#undef flags